For best results do this one in the dark. When the famale partner askes for the male to pull out, the male should cum in his hand. he should then go up to the famale partner and act like he is gonna slap her in the face with the jizz hand, he should slap her in the face a few times with the unjizzed hand. After her gaurd is down the male must slap his female partner in the face with the jizzed on hand.
She did not want me to cum in her so i decided to give her a slap happy surprise.